1 /* Test the Modern GNU Objective-C Runtime API.
3 This is test 'class', covering all functions starting with 'class'.
4 Tests calling the functions with a meta class as argument are covered
5 in the separate file, gnu-api-2-class-meta.m. */
8 /* { dg-skip-if "No API#2 pre-Darwin9" { *-*-darwin[5-8]* } { "-fnext-runtime" } { "" } } */
9 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
11 /* To get the modern GNU Objective-C Runtime API, you include
13 #include <objc/runtime.h>
18 @interface MyRootClass
25 @implementation MyRootClass
26 + alloc { return class_createInstance (self, 0); }
27 - init { return self; }
28 + initialize { return self; }
35 @protocol MySecondProtocol
36 - (id) setVariable: (id)value;
39 @interface MySubClass : MyRootClass <MyProtocol>
41 - (void) setVariable: (id)value;
45 @implementation MySubClass
46 - (void) setVariable: (id)value { variable_ivar = value; }
47 - (id) variable { return variable_ivar; }
50 @interface MyOtherSubClass : MySubClass
53 @implementation MyOtherSubClass
56 @interface DifferentClass : MyRootClass
61 @implementation DifferentClass
62 - (id) myClass { return object_getClass (self); }
63 - (id) self { return self; }
66 @interface MySubClass (MySelf)
70 /* Hack to calculate the log2 of a byte alignment. */
72 log_2_of (unsigned int x)
74 unsigned char result = 0;
76 /* We count how many times we need to divide by 2 before we reach 1.
77 This algorithm is good enough for the small numbers (such as 8,
78 16 or 64) that we have to deal with. */
88 int main(int argc, void **args)
90 /* Functions are tested in alphabetical order. */
92 printf ("Testing class_addIvar ()...\n");
94 Class new_class = objc_allocateClassPair (objc_getClass ("MySubClass"), "MySubSubClass", 0);
99 if (! class_addIvar (new_class, "variable2_ivar", sizeof (id),
100 log_2_of (__alignof__ (id)), @encode (id)))
103 if (! class_addIvar (new_class, "variable3_ivar", sizeof (unsigned char),
104 log_2_of (__alignof__ (unsigned char)), @encode (unsigned char)))
107 if (! class_addIvar (new_class, "variable4_ivar", sizeof (unsigned long),
108 log_2_of (__alignof__ (unsigned long)), @encode (unsigned long)))
111 objc_registerClassPair (new_class);
114 MySubClass *o = [[(Class)objc_getClass ("MySubSubClass") alloc] init];
115 Ivar variable2 = class_getInstanceVariable (objc_getClass ("MySubSubClass"), "variable2_ivar");
116 Ivar variable3 = class_getInstanceVariable (objc_getClass ("MySubSubClass"), "variable3_ivar");
117 Ivar variable4 = class_getInstanceVariable (objc_getClass ("MySubSubClass"), "variable4_ivar");
119 if (variable2 == NULL || variable3 == NULL || variable4 == NULL)
122 if (strcmp (ivar_getName (variable2), "variable2_ivar") != 0)
125 if (strcmp (ivar_getName (variable3), "variable3_ivar") != 0)
128 if (strcmp (ivar_getName (variable4), "variable4_ivar") != 0)
132 unsigned char *var3 = (unsigned char *)((char *)o + ivar_getOffset (variable3));
133 unsigned long *var4 = (unsigned long *)((char *)o + ivar_getOffset (variable4));
135 object_setIvar (o, variable2, new_class);
139 if (object_getIvar (o, variable2) != new_class)
151 printf ("Testing class_addMethod ()...\n");
153 Class new_class = objc_allocateClassPair (objc_getClass ("MyRootClass"), "MySubClass2", 0);
154 Method method1 = class_getInstanceMethod (objc_getClass ("MySubClass"), @selector (setVariable:));
155 Method method2 = class_getInstanceMethod (objc_getClass ("MySubClass"), @selector (variable));
157 if (new_class == Nil)
160 if (! class_addIvar (new_class, "variable_ivar", sizeof (id),
161 log_2_of (__alignof__ (id)), @encode (id)))
164 if (! class_addMethod (new_class, @selector (setVariable:), method_getImplementation (method1),
165 method_getTypeEncoding (method1)))
168 if (! class_addMethod (new_class, @selector (variable), method_getImplementation (method2),
169 method_getTypeEncoding (method2)))
172 /* Test that if the method already exists in the class,
173 class_addMethod() returns NO. */
174 if (class_addMethod (new_class, @selector (variable), method_getImplementation (method2),
175 method_getTypeEncoding (method2)))
178 objc_registerClassPair (new_class);
180 /* Now, MySubClass2 is basically the same as MySubClass! We'll
181 use the variable and setVariable: methods on it. */
183 MySubClass *o = (MySubClass *)[[(Class)objc_getClass ("MySubClass2") alloc] init];
187 if ([o variable] != o)
191 /* Now, try that if you take an existing class and try to add an
192 already existing method, class_addMethod returns NO. This is
193 subtly different from before, when 'new_class' was still in
194 construction. Now it's a real class and the libobjc internals
195 differ between the two cases. */
196 if (class_addMethod (new_class, @selector (variable), method_getImplementation (method2),
197 method_getTypeEncoding (method2)))
201 printf ("Testing class_addProtocol ()...\n");
203 if (!class_addProtocol (objc_getClass ("MySubClass"), @protocol (MySecondProtocol)))
206 if (!class_conformsToProtocol (objc_getClass ("MySubClass"), @protocol (MyProtocol)))
209 if (!class_conformsToProtocol (objc_getClass ("MySubClass"), @protocol (MySecondProtocol)))
213 printf ("Testing class_conformsToProtocol ()...\n");
215 if (class_conformsToProtocol (objc_getClass ("MyRootClass"), @protocol (MyProtocol)))
218 if (!class_conformsToProtocol (objc_getClass ("MySubClass"), @protocol (MyProtocol)))
221 /* Test that class_conformsToProtocol checks the class, but not
223 if (class_conformsToProtocol (objc_getClass ("MyOtherSubClass"), @protocol (MyProtocol)))
227 printf ("Testing class_copyIvarList ()...\n");
230 Ivar * list = class_copyIvarList (objc_getClass ("MySubClass"), &count);
235 if (strcmp (ivar_getName (list[0]), "variable_ivar") != 0)
242 printf ("Testing class_copyIvarList () on class with no instance variables...\n");
245 Ivar * list = class_copyIvarList (objc_getClass ("MyOtherSubClass"),
255 printf ("Testing class_copyMethodList ()...\n");
258 Method * list = class_copyMethodList (objc_getClass ("MySubClass"), &count);
263 if (! ((strcmp (sel_getName (method_getName (list[0])), "variable") == 0
264 && strcmp (sel_getName (method_getName (list[1])), "setVariable:") == 0)
265 || (strcmp (sel_getName (method_getName (list[0])), "setVariable:") == 0
266 && strcmp (sel_getName (method_getName (list[1])), "variable") == 0)))
273 /* TODO: Test new ABI (when available). */
274 printf ("Testing class_copyPropertyList ()...\n");
277 objc_property_t * list = class_copyPropertyList (objc_getClass ("MySubClass"), &count);
279 if (count != 0 || list != NULL)
283 printf ("Testing class_copyProtocolList ()...\n");
286 Protocol ** list = class_copyProtocolList (objc_getClass ("MySubClass"), &count);
288 /* Remember that we added MySecondProtocol in the test above. */
292 if (! ((strcmp (protocol_getName (list[0]), "MyProtocol") == 0
293 && strcmp (protocol_getName (list[1]), "MySecondProtocol") == 0)
294 || (strcmp (protocol_getName (list[0]), "MySecondProtocol") == 0
295 && strcmp (protocol_getName (list[1]), "MyProtocol") == 0)))
302 printf ("Testing class_createInstance ()...\n");
304 MySubClass *object = [[MySubClass alloc] init];
306 [object setVariable: object];
307 if ([object variable] != object)
311 printf ("Testing class_getClassMethod ()...\n");
313 Method method = class_getClassMethod (objc_getClass ("MySubClass"),
319 if (strcmp (sel_getName (method_getName (method)), "alloc") != 0)
322 if (class_getClassMethod (objc_getClass ("MySubClass"),
323 @selector(variable)))
327 printf ("Testing class_getClassVariable ()...\n");
329 if (class_getClassVariable (objc_getClass ("MySubClass"), "variable_ivar"))
333 printf ("Testing class_getInstanceMethod ()...\n");
335 Method method = class_getInstanceMethod (objc_getClass ("MySubClass"),
336 @selector(variable));
341 if (strcmp (sel_getName (method_getName (method)), "variable") != 0)
344 if (class_getInstanceMethod (objc_getClass ("MySubClass"),
349 printf ("Testing class_getInstanceSize ()...\n");
351 if (class_getInstanceSize (objc_getClass ("MyRootClass")) != sizeof (struct objc_object))
355 printf ("Testing class_getInstanceVariable ()...\n");
357 Ivar variable = class_getInstanceVariable (objc_getClass ("MySubClass"), "variable_ivar");
359 if (variable == NULL)
362 if (strcmp (ivar_getName (variable), "variable_ivar") != 0)
365 if (class_getInstanceVariable (objc_getClass ("MySubClass"), "variable_ivar_no"))
369 printf ("Testing class_getIvarLayout ()...\n");
371 if (class_getIvarLayout (objc_getClass ("MyRootClass")) != NULL)
375 printf ("Testing class_getMethodImplementation ()...\n");
377 MySubClass *object = [[MySubClass alloc] init];
378 IMP imp = class_getMethodImplementation (objc_getClass ("MySubClass"),
379 @selector(variable));
384 [object setVariable: object];
386 if ((*imp)(object, @selector(variable)) != object)
390 /* This function does not exist with the GNU runtime. */
391 /* printf ("Testing class_getMethodImplementation_stret ()...\n"); */
393 printf ("Testing class_getName ()...\n");
395 if (strcmp (class_getName (objc_getClass ("MyRootClass")),
400 /* TODO: Test new ABI (when available). */
401 printf ("Testing class_getProperty ()...\n");
403 if (class_getProperty (objc_getClass ("MyRootClass"), "property") != NULL)
407 printf ("Testing class_getSuperclass ()...\n");
409 MySubClass *object = [[MySubClass alloc] init];
410 if (class_getSuperclass (object_getClass (object)) != objc_getClass ("MyRootClass"))
413 /* Test that it works on a newly created, but not registered, class. */
415 Class new_class = objc_allocateClassPair (objc_getClass ("MyRootClass"), "MySubClass3", 0);
417 if (class_getSuperclass (new_class) != objc_getClass ("MyRootClass"))
422 printf ("Testing class_getVersion ()...\n");
424 if (class_getVersion (objc_getClass ("MySubClass")) != 0)
428 printf ("Testing class_getWeakIvarLayout ()...\n");
430 if (class_getWeakIvarLayout (objc_getClass ("MyRootClass")) != NULL)
434 printf ("Testing class_isMetaClass ()...\n");
436 MySubClass *object = [[MySubClass alloc] init];
437 if (class_isMetaClass (object_getClass (object))
438 || ! class_isMetaClass (object_getClass (object_getClass (object))))
442 printf ("Testing class_replaceMethod ()...\n");
444 Method new_method = class_getInstanceMethod (objc_getClass ("DifferentClass"),
445 @selector (myClass));
446 Method old_method = class_getInstanceMethod (objc_getClass ("MySubClass"),
447 @selector (variable));
448 const char *new_types = method_getTypeEncoding (new_method);
449 IMP new_imp = method_getImplementation (new_method);
450 const char *old_types = method_getTypeEncoding (old_method);
451 IMP old_imp = class_replaceMethod (objc_getClass ("MySubClass"), @selector (variable),
452 method_getImplementation (new_method),
453 method_getTypeEncoding (new_method));
454 MySubClass *o = [[MySubClass alloc] init];
458 /* Try the new method implementation. */
459 if ([o variable] != objc_getClass ("MySubClass"))
462 /* Put the original method back. */
463 class_replaceMethod (objc_getClass ("MySubClass"), @selector (variable),
466 /* Test it's back to what it was. */
467 if ([o variable] != o)
471 DifferentClass *o = [[DifferentClass alloc] init];
473 /* Finally, try adding a new method. */
474 class_replaceMethod (objc_getClass ("DifferentClass"), @selector (mySelf),
477 if ([(MySubClass*)o mySelf] != objc_getClass ("DifferentClass"))
482 printf ("Testing class_respondsToSelector ()...\n");
484 if (! class_respondsToSelector (objc_getClass ("MySubClass"), @selector(setVariable:)))
487 if (class_respondsToSelector (objc_getClass ("MyRootClass"), @selector(setVariable:)))
491 /* This is not really implemented with the GNU runtime. */
492 /* printf ("Testing class_setIvarLayout ()...\n"); */
494 printf ("Testing class_setVersion ()...\n");
496 class_setVersion (objc_getClass ("MySubClass"), 45);
498 if (class_getVersion (objc_getClass ("MySubClass")) != 45)
501 class_setVersion (objc_getClass ("MySubClass"), 46);
503 if (class_getVersion (objc_getClass ("MySubClass")) != 46)
507 /* This is not really implemented with the GNU runtime. */
508 /* printf ("Testing class_setWeakIvarLayout ()...\n"); */